E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells

More topics under "E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells" (324,830)
E21B 1 - Percussion drilling (2,080)
E21B 10 - Drill bits (19,464)
E21B 11 - Other drilling tools (454)
E21B 12 - Accessories for drilling tools (993)
E21B 15 - Supports for the drilling machine, e.g. derricks or masts (4,619)
E21B 17 - Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Casings; Tubings (27,800)
E21B 19 - Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables (17,198)
E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780)
E21B 23 - Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells (12,712)
E21B 25 - Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors (2,102)
E21B 27 - Containers for collecting or depositing substances in boreholes or wells, e.g. bailers for collecting mud or sand; Drill bits with means for collecting substances, e.g. valve drill bits (1,068)
E21B 28 - Vibration generating arrangements for boreholes or wells, e.g. for stimulating production (888)
E21B 29 - Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground (5,744)
E21B 3 - Rotary drilling (4,061)
E21B 31 - Fishing for or freeing objects in boreholes or wells (3,788)
E21B 33 - Sealing or packing boreholes or wells (33,564)
E21B 34 - Valve arrangements for boreholes or wells (14,685)
E21B 35 - Methods or apparatus for preventing or extinguishing fires (324)
E21B 36 - Heating, cooling, or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones (4,262)
E21B 37 - Methods or apparatus for cleaning boreholes or wells (5,129)
E21B 4 - Drives for drilling, used in the borehole (6,032)
E21B 40 - Tubing catchers, automatically arresting the fall of oil-well tubing (79)
E21B 41 - Equipment or details not covered by groups (7,984)
E21B 43 - Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (64,186)
E21B 44 - Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions (5,356)
E21B 45 - Measuring the drilling time or rate of penetration (257)
E21B 47 - Survey of boreholes or wells (31,352)
E21B 49 - Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells (11,875)
E21B 6 - Drives for drilling with combined rotary and percussive action (930)
E21B 7 - Special methods or apparatus for drilling (22,064)

Patents for E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (2,021)
05/2004
05/13/2004	US20040091378 Mechanical bladder pump
05/06/2004	US20040084223 Cutting element having enhanced cutting geometry
05/06/2004	US20040084213 System for drilling oil and gas wells using oversized drill string to achieve increased annular return velocities
04/2004
04/29/2004	WO2004035983A2 Open water running tool and lockdown sleeve assembly
04/22/2004	WO2004033842A2 Method and apparatus for removing cuttings from a deviated wellbore
04/22/2004	WO2003097988A9 Equalizer valve and method of use
04/22/2004	CA2501315A1 Methods and apparatus for a subsea tie back
04/20/2004	CA2280079C Enhanced oil recovery method
04/08/2004	WO2004001178A3 Method and apparatus for downhole pipe or casing repair
04/08/2004	WO2003046329A3 A wellhead assembly for communicating with the casing hanger annulus
04/08/2004	WO2003023179A3 System for lining a wellbore casing
04/08/2004	US20040067110 Active hold down system for jack-up drilling unit
04/01/2004	WO2004027205A2 Mono diameter wellbore casing
04/01/2004	WO2004027204A2 Cutter for wellbore casing
04/01/2004	WO2004027203A2 Mono-column floating platform and method of installing same
04/01/2004	WO2004027202A2 Inner riser adjustable hanger and seal assembly
04/01/2004	WO2004027200A2 Bottom plug for forming a mono diameter wellbore casing
04/01/2004	US20040060705 Method and apparatus for increasing fluid recovery from a subterranean formation
04/01/2004	CA2499030A1 Mono diameter wellbore casing
03/2004
03/25/2004	WO2004025070A2 Turboalternator offload control with combustor blowout prevention
03/25/2004	WO2004025069A2 System and method of drilling and completion
03/25/2004	WO2004025068A2 System and method for well workover with horizontal tree
03/25/2004	WO2004025067A2 Reducing paraffin, asphaltene, and hydrate accumulations in wells
03/25/2004	WO2003042485A3 Apparatus for extraction of oil via underground drilling and production location
03/23/2004	US6708786 Mounting attachment and bearing system for an industrial earth-boring cutter
03/23/2004	US6708766 Wellhead assembly for communicating with the casing hanger annulus
03/18/2004	WO2004022903A2 Top drive swivel apparatus and method
03/18/2004	WO2004022902A2 Tie-back connection for subsea well
03/18/2004	US20040050554 Accelerated production of gas from a subterranean zone
03/17/2004	WO2004027199A2 Accelerated production of gas from a subterranean zone
03/11/2004	US20040048751 Process for controlling gas migration during well cementing
03/09/2004	US6702025 Hydraulic control assembly for actuating a hydraulically controllable downhole device and method for use of same
03/04/2004	WO2004018825A2 Riser connector
03/04/2004	WO2004018824A2 Magnetic impulse applied sleeve method of forming a wellbore casing
03/04/2004	WO2004018823A2 Interposed joint sealing layer method of forming a wellbore casing
03/04/2004	WO2004018822A2 A method and process for prediction of subsurface fluid and rock pressures in the earth
03/04/2004	US20040040717 Method for upward growth of a hydraulic fracture along a well bore sandpacked annulus
03/03/2004	EP1394353A2 Controlling gas migration during well cementing
02/2004
02/29/2004	CA2436377A1 Process for controlling gas migration during well cementing
02/26/2004	US20040035583 Wave seal to resist extrusion during equalization
02/12/2004	WO2004013448A2 Method for using coconut coir as a lost circulation material for well drilling
02/12/2004	US20040025583 Method and apparatus for determining downhole pressures during a drilling operation
02/06/2004	CA2436637A1 Wave seal to resist extrusion during equalization
02/05/2004	WO2004011763A2 Mechanical bladder pump
02/05/2004	CA2494035A1 Mechanical bladder pump
01/2004
01/22/2004	WO2004007896A2 Tubular slip device and method
01/22/2004	WO2004007895A2 Mud saver valve
01/22/2004	US20040011600 Tubular slip device and method
01/15/2004	WO2004005663A2 Tapered ramp positive lock latch mechanism
01/15/2004	WO2004005662A2 Method for upward growth of a hydraulic fracture along a well bore sandpacked annulus
01/15/2004	WO2004005660A2 Active hold down system for jack-up drilling unit
01/15/2004	US20040007362 Tapered ramp positve lock latch mechanism
01/08/2004	WO2004003331A2 Non-corrosive amphoteric surfactants and method of well treatment
01/08/2004	WO2004003329A2 Remote down-hole well telemetry
01/08/2004	CA2490363A1 Non-corrosive amphoteric surfactants and method of well treatment
01/07/2004	EP1378554A1 Hydrophilic polymer concentrates
01/01/2004	US20040000762 Equalizer valve
01/01/2004	US20040000339 Multiple dispensing check valve delivery system
12/2003
12/31/2003	WO2004001178A2 Method and apparatus for downhole pipe or casing repair
12/25/2003	US20030236173 To increase the viscosity or decrease the fluid loss of well drilling and servicing fluids
12/24/2003	WO2003106130A2 Collapsible expansion cone
12/24/2003	CA2489283A1 Collapsible expansion cone
12/18/2003	WO2003104603A2 New and improved method and apparatus involving an integrated or otherwise combined exit guide and section mill for sidetracking or directional drilling from existing wellbores
12/18/2003	WO2003104601A2 Mono-diameter wellbore casing
12/18/2003	CA2493990A1 New and improved method and apparatus involving an integrated or otherwise combined exit guide and section mill for sidetracking or directional drilling from existing wellbores
12/18/2003	CA2489058A1 Mono-diameter wellbore casing
12/09/2003	CA2215848C Arrangement in a pipe handling system
11/2003
11/27/2003	WO2003097988A2 Equalizer valve and method of use
11/27/2003	WO2003097987A2 A device for a long well tool
11/27/2003	WO2003042486A3 Collapsible expansion cone
11/18/2003	US6649906 Method and apparatus for safely operating radiation generators in while-drilling and while-tripping applications
11/18/2003	US6648550 Subterranean drainage device
11/13/2003	WO2003093623A2 Mono diameter wellbore casing
11/13/2003	CA2484966A1 Mono diameter wellbore casing
10/2003
10/30/2003	WO2003089752A2 Well completion with merged influx of well fluids
10/30/2003	WO2003050376A3 Burst qam downhole telemetry system
10/16/2003	US20030192719 Drilling apparatus
10/09/2003	WO2003083248A2 Perforation method and apparatus
09/2003
09/30/2003	CA2293427C System for drilling and completing multilateral wells
09/25/2003	WO2003078785A2 Collapsible expansion cone
09/25/2003	CA2478868A1 Collapsible expansion cone
09/23/2003	US6622791 Method and apparatus for increasing fluid recovery from a subterranean formation
09/10/2003	EP0839255B1 Safeguarded method and apparatus for fluid communication using coiled tubing, with application to drill stem testing
09/09/2003	US6615921 Apparatus and method for remote adjustment of drill string centering to prevent damage to wellhead
09/04/2003	WO2003072902A2 A system and method for fracturing and gravel packing a wellbore
09/04/2003	US20030165360 Method and apparatus for replacement of underground pipe
09/04/2003	US20030164242 Displacement and support device for a portable power tool
09/03/2003	EP0800609B1 A drilling method and bit assembly to realize the method
09/02/2003	CA2106136C Oilfield valve
08/2003
08/28/2003	WO2003071086A2 Mono-diameter wellbore casing
08/14/2003	WO2003067018A2 Well system
08/14/2003	US20030150647 Rotary support table
08/14/2003	US20030150619 Hydraulic control assembly for actuating a hydraulically controllable downhole device and method for use of same
08/14/2003	CA2755094A1 Well system
08/07/2003	US20030148638 Technique for providing power to a completion used in a subterranean environment
08/05/2003	US6601475 Hardfaced drill bit structures and method for making such structures
07/2003
07/31/2003	WO2003062484A1 Element for percussive rock drilling and method for its production
07/30/2003	CN1432716A Feeding and supporting unit of movable drilling machine
07/24/2003	WO2003060282A2 Method and apparatus for replacement of underground pipe
07/24/2003	WO2003060280A2 Rotary support table

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